CentOS默認安裝Python2
一、首先安裝依賴包
1）首先安裝gcc編譯器，gcc有些系統版本已經默認安裝，通過 gcc --version 查看。
2）安裝其它依賴包
yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel libffi-devel
3）下載Python3安裝包
wget https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tgz
4）解壓
tar -xvf Python-3.7.0.tgz
5）創建文件夾吧Python安裝在里面
mkdir /usr/local/python3
cd Python3
./configure --prefix=/usr/local/python3/
make && make install
6) 建立軟連接
ln -s /usr/local/python3/bin/python3.7 /usr/bin/python3
ln -s /usr/local/python3/bin/pip3.7 /usr/bin/pip3
7）測試是否可以使用
python3 Python 3.7.0 (default, Jan 14 2019, 01:20:02) [GCC 4.8.5 20150623 (Red Hat 4.8.5-36)] on linux Type "help", "copyright", "credits" or "license" for more information. >>>